Could I get some clarity on Thieves Tools and lockpicking. Do you need the tools? Do you need proficiency?

@wax_eagle@JeremyECrawfordCould I get some clarity on thieves tools and lockpicking. Do you need the tools? Do you need proficiency? anyone can use tools, prof bonus adds if proficient. No tools, DM can say no check or disadvantage.

So, anyone can use thieves tools, but you have to be proficient to pick a locked door? What about a locked chest? Disable traps? Anyone can try, prof just means add bonus, unless lock/trap/dm expressly says otherwise